leandrof/linux
1
0
Fork 0
forked from Minki/linux
Code Issues Pull Requests Packages Projects Releases Wiki Activity

perf tools: Update some code references in design.txt

Browse Source 
Update the names of some functions and enums in design.txt. The document
still has some stale information, but the motivation behind this patch
is to allow a developer to quickly grep and learn about the associated
structures.

Signed-off-by: Ramkumar Ramachandra <artagnon@gmail.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: http://lkml.kernel.org/r/1395169804-1293-1-git-send-email-artagnon@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Ramkumar Ramachandra 2014-03-18 15:10:04 -04:00 committed by Arnaldo Carvalho de Melo
parent a33f6efc43
commit b68eebd1c2
1 changed files with 6 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
tools/perf/design.txt
View File

@ -18,7 +18,7 @@ underlying hardware counters.
Performance counters are accessed via special file descriptors.
There's one file descriptor per virtual counter used.
The special file descriptor is opened via the perf_event_open()
The special file descriptor is opened via the sys_perf_event_open()
system call:
int sys_perf_event_open(struct perf_event_attr *hw_event_uptr,
@ -82,7 +82,7 @@ machine-specific.
If 'raw_type' is 0, then the 'type' field says what kind of counter
this is, with the following encoding:
enum perf_event_types {
enum perf_type_id {
PERF_TYPE_HARDWARE = 0,
PERF_TYPE_SOFTWARE = 1,
PERF_TYPE_TRACEPOINT = 2,
@ -95,7 +95,7 @@ specified by 'event_id':
* Generalized performance counter event types, used by the hw_event.event_id
* parameter of the sys_perf_event_open() syscall:
*/
enum hw_event_ids {
enum perf_hw_id {
/*
* Common hardware events, generalized by the kernel:
*/
@ -129,7 +129,7 @@ software events, selected by 'event_id':
* physical and sw events of the kernel (and allow the profiling of them as
* well):
*/
enum sw_event_ids {
enum perf_sw_ids {
PERF_COUNT_SW_CPU_CLOCK = 0,
PERF_COUNT_SW_TASK_CLOCK = 1,
PERF_COUNT_SW_PAGE_FAULTS = 2,
@ -230,7 +230,7 @@ these events are recorded in the ring-buffer (see below).
The 'comm' bit allows tracking of process comm data on process creation.
This too is recorded in the ring-buffer (see below).
The 'pid' parameter to the perf_event_open() system call allows the
The 'pid' parameter to the sys_perf_event_open() system call allows the
counter to be specific to a task:
pid == 0: if the pid parameter is zero, the counter is attached to the
@ -260,7 +260,7 @@ The 'flags' parameter is currently unused and must be zero.
The 'group_fd' parameter allows counter "groups" to be set up. A
counter group has one counter which is the group "leader". The leader
is created first, with group_fd = -1 in the perf_event_open call
is created first, with group_fd = -1 in the sys_perf_event_open call
that creates it. The rest of the group members are created
subsequently, with group_fd giving the fd of the group leader.
(A single counter on its own is created with group_fd = -1 and is